Brominated phenol formaldehyde resin was utilised to vulcanize butyl rubber in the presence of carbon black as well as in the absence of carbon black. UnfDled vulcanizates were found to conform to the Monney-Rivlin equation in their stress elongation behaviour. Cross-linking efficiency of the resin was deduced and the gel point was found in the vjcinityof the concentration O.S PHR of resin.
S S ALI ,K M JANJUA ,EHSAN ALI ,S T A BOKHARI ,
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